A clock shows 12:50. What time does its mirror image show, the mirror being placed vertically beside the clock?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 11:10
A vertical mirror turns the clock face left to right, so the real time and the mirror time add up to 12 hours: the mirror time is 11:60 minus the time. A time between 12:00 and 1:00 is first read as 0 hours and some minutes.
12:50 is 0 h 50 min past 12
Mirror time \(=\) 11 h 60 min − 0 h 50 min
Minutes: \(60-50=10\); hours: \(11-0=11\)
So the mirror image shows 11:10
